Pool cleaning apparatus

ABSTRACT

A pool cleaning apparatus wherein a manually movable weight means is disposable in various positions on the bottom of a swimming pool and a flexible water delivery conduit is coupled to the weight means and communicates with a rotary means having a passage therein which delivers water to a flexible sinuously movable pool cleaning tube; communicating with said passage means and coupled to said rotary means is a jet nozzle adapted to cause rotation of said rotary means about a generally vertical axis so that the pool cleaning tube coupled to said rotary means and communicating with the water delivery conduit may progressively move and be directed outwardly away from the vertical axis of the rotary means in various directions in accordance with the motivation of said rotary means by jet reaction force created thereon due to operation of the jet nozzle means coupled thereto. The disclosure further sets forth a disposition of the water delivery tube communicating with the rotary means and extending in a generally upward central relationship to the weight means with which said rotary means is coupled.

Uited States Patent [191 Koble, Jr. et al.

[ 1 Jan. 23, 1973 POOL CLEANING APPARATUS [75] Inventors: Robert L.Koble, Jr.; John M.

Goettl, both of Phoenix, Ariz.

[73] Assignee: George J. Ghiz, Phoenix, Ariz. 22 Filed: Oct. 29, 1971[21] Appl. No.: 193,713

UNITED STATES PATENTS Pansini ..l5/l.7 X Vernon ..134/168 R PrimaryExaminerEdward L. Roberts Att0rneyWilliam H. Dean [57] ABSTRACT A poolcleaning apparatus wherein a manually movable weight means is disposablein various positions on the bottom of a swimming pool and a flexiblewater delivery conduit is coupled to the weight means and communicateswith a rotary means having a passage therein which delivers water to aflexible sinuously movable pool cleaning tube; communicating with saidpassage means and coupled to said rotary means is a jet nozzle adaptedto cause rotation of said rotary means about a generally vertical axisso that the pool cleaning tube coupled to said rotary means andcommunicating with the water delivery conduit may progressively move andbe directed outwardly away from the vertical axis of the rotary means invarious directions in accordance with the motivation of said rotarymeans by jet reaction force created thereon due to operation of the jetnozzle means coupled thereto. The disclosure further sets forth adisposition of the water delivery tube communicating with the rotarymeans and extending in a generally upward central relationship to theweight means with which said rotary means is coupled.

8 Claims, 3 Drawing Figures PAIENTEDJAH23 ma 3712.313

SHEET 1 OF 2 INVENTORS JOHN M. GOETTL ROBERT L. KOBLE JR. BY

PATENTED JAN 2 3 i975 SHEET 2 OF 2 INVENTORS JOHN M. GOETTL ROBERT L.KOBLE JR.

W/QM

POOL CLEANING APPARATUS BACKGROUND OF THE INVENTION Prior art poolcleaning apparatus such as disclosed in a prior application of Robert L.Koble, Jr. and John M. Goettl, Ser. No. 53468, filed July 9, I970, andnow abandoned comprises a manually movable weight means which holds awater distributor in a fixed position frictionally on the bottom of aswimming pool and in accordance with this apparatus sinuously movablejet reactive and flexible pool cleaning tubes are coupled and held instationary position relative to weight means of the distributor so thateach pool cleaning tube of this prior art structure is always directedin a certain direction from the weight means and distributing structure,thus requiring several of the pool cleaning tubes extending in differentdirections for the purposes of covering efficiently an entire areasurrounding the weight means and water distributor structure asdisclosed in the aforementioned patent application. Such prior artstructures, while they are very convenient and operate very efficiently,utilize a plurality of flexible pool cleaning tubes and accordingly thecost and main tenance of the plurality of tubes has been an economicconsideration relative to the initial price of such apparatus as well asthe continued operation thereof.

When a plurality of jet reaction pool cleaning tubes are utilized inaccordance with the aforementioned patent application, the volume ofwater available for operating such pool cleaning apparatus must bedivided through a plurality of such tubes since each sinuous tube isextended from the water distributor in a fixed direction and thereforeseveral tubes are necessary to completely cover an area surrounding acentral distributor when the distributor holds the ends of the jet tubesstationarily in connection therewith.

SUMMARY OF THE INVENTION The present invention comprises a weight meanswhich may readily be manually moved to various locations on the bottomof a swimming pool and this weight means has sufficient magnitudefrictionally to hold it in position and to thereby resist movementthereof in response to forces created by jet reaction pool cleaning tubemeans in connection with the weight means of the invention. Theinvention comprises a rotary means which receives water under pressurefrom a water delivery conduit in connection with the weight means andcoupled to the rotary means is a flexible sinuously operated jetreactive pool cleaning tube and means is provided for rotating therotary means so that a single pool cleaning tube may cover an areaencompassing 360 around a generally vertical axis which is generallycentered relative to the weight means. The rotary means is rotatablyoperated by force applied by efflux from a jet nozzle means inconnection with the rotary means so that the pool cleaning tube coupledto the rotary means is constantly moved in various radially directedpositions for 360 about a substantially vertical axis whereby maximumvolume of water may be expelled through the pool cleaning tube and itmay be of substantial magnitude so as to perform a substantial amount ofwork and so that it may be very active in a sinuous moving attituderesponsive -to jet reaction caused by water under pressure issuing fromthe pool cleaning tube. Additionally, the invention provides for meansto vary the pressure differential relative to a jet nozzle meanscommunicating with the rotary means so that the jet nozzle means mayvary the rotational speed of the rotary means and thereby vary therotational support of the jet reactive pool cleaning tube means coupledto the rotary means and accordingly the mode of operation of the presentinvention may be varied in accordance with environmental conditionswithin a given swimming pool. The invention also comprises a generallyvertical disposition of the water delivery conduit of the pool cleaningapparatus so as to provide for upward extension of water deliveryconduit from a generally central area of the weight means of theinvention and so as to allow the flexible water delivery conduit toextend upward and away from the bottom and sides of a swimming pool insuch a relation as to avoid the possibility of the jet reaction poolcleaning tubes from tangling with the water delivery conduit.Additionally, the water delivery conduit as it extends substantiallyvertical and centrally above the weight means of the invention, providesconvenient means for handling the pool cleaning apparatus of theinvention both as to the placement thereof in a swimming pool and in anupright position on the bottom thereof, and as to the movement of theapparatus from one place to another so as to allow the operator to placethe apparatus in the most advantageous position in a swimming pool.

Accordingly, it is an object of the invention to provide an improvedpool cleaning apparatus which embodies certain improvements overapparatus disclosed in said aforementioned patent application.

Another object of the invention is to provide a weight means adaptedmanually to be moved about into various positions on the bottom of aswimming pool and to have sufficient weight and friction with relationto the bottom of the pool to maintain itself in fixed relation to thepool side walls while a rotary means coupled to the weight meansreceives water under pressure through a delivery conduit and while a jetreactive pool cleaning tube coupled to the rotary means moves about agenerally vertical axis as it moves sinuously and thus may beprogressively directed in any one of many directions throughout 360about a substantially vertical axis extending in a generally verticaldirection near the central portion of the weight means. Another objectof the invention is to provide a novel rotary means adapted to deliverwater under pressure to a jet reactive pool cleaning tube and wherein ajet nozzled means coupled to the rotary means delivers water underpressure in a direction to cause jet reaction rotation of the rotarymeans so as to constantly move a connected portion of said pool cleaningtube about a vertical axis for 360 about said weight means.

Another object of the invention is to provide a rotary means supportingand conveying water under pressure to a jet reactive flexible poolcleaning tube and wherein jet nozzle means is provided for rotating therotary means and wherein valve means in the rotary means adjusts apressure differential between water entering the rotary means and thatissuing from jet nozzle means so as to vary the rotative rate of saidrotary means about a vertical axis so as to vary the rate of a flexiblepool cleaning tube connected to the rotary means and reacting sinuouslyin response to water under pressure passing therethrough from the rotarymeans.

Further objects and advantages of the invention may be apparent from thefollowing specification, appended claims and accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of aswimming pool showing portions thereof broken away and in section, andillustrating pool cleaning apparatus of the present invention disposedin said swimming pool;

FIG. 2 is an enlarged horizontal sectional view taken from the line 22of FIG. 1 showing structural details of the pool cleaning apparatus ofthe invention; and

FIG. 3 is a fragmentary vertical sectional view taken from the line 33of FIG. 2.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1 of thedrawings, pool cleaning apparatus of the invention comprises a weightmeans which is coupled to a water delivery conduit 12, as will behereinafter described in detail. The weight means 10 as shown in FIG. 3of the drawings, is provided with a lower surface means 14 adaptedfrictionally to rest on the bottom of a swimming pool as shown in FIG. 1of the drawings. The weight means 10 is generally circular in horizontalcross section as shown best in FIGS. 1 and 2 of the drawings, and themaximum horizontal dimensions of this weight means are equal to only asmall fraction of the length or breadth of the swimming pool 15 so thatthe weight means 10 may be moved into various positions as desired inthe pool 15 for efficiently cleaning the pool in accordance with itsgeometry and in accordance with the conditions thereof. The weight means10 may be handled by the flexible water delivery conduit 12 as will behereinafter described. The weight means 14 is provided with a hollowhousing structure providing a cavity wherein weight material 16 isdisposed. This material may be concrete or any other suitable materialhaving a sufficient density in accordance with its volume to provide forsubstantial frictional engagement of the engaging surface 14 with thebottom of a swimming pool such as swimming pool 15 and the magnitude ofthe weight material 16 being such as to afford resistance to jetreaction forces imposed by sinuous action of a jet reactive poolcleaning tube 18 which receives water under pressure from the deliverycircuit 12 as will be hereinafter described. Thus the weight means 10 isreadily movable to various positions in the pool and has sufficientweight to hold itselfin a fixed preselected position without having thisposition changed by forces of the tube 18 as it responds to jet reactionof water passing therethrough and during sinuous movement of the poolcleaning tube 18 as will be hereinafter described in detail.

The housing of the weight means 10 is provided with an upper wall 20having an upstanding tubular portion 22 to which a tubular distributorconduit 24 is secured. This distributor conduit 24 is provided withwater delivery openings 26 and 28 which are directed in oppositedirections from the axis of the conduit 24. This conduit 24 is providedwith a fitting 26 to which the flexible water delivery conduit 12 issecured in communication with the interior of the conduit 24 so as todeliver water under pressure thereinto.

A rotary means 30 is generally domeshaped and is provided with anopening 32 surrounding the fitting 26 of the conduit 24. The rotarymeans 30 is provided with a central hub 32 surrounding the waterdelivery conduit 24 and adapted to receive water under pressure from theopenings 26 and 28. The hub 32 is provided with annular flexible walls34 and 36 having respective openings 38 and 40 surrounding the outerside of the conduit 24 and flexing seals 42 and 44 are coupled to theflexible walls 34 and 36 respectively, the seal 42 bearing on a shoulder46 of the conduit 24, while the seal 44 bears upon an upper surface 48of the upper wall 20 of the housing of the weight means 10.

Accordingly, the hub 32 is free to rotate about the conduit 24 which isdisposed in a generally vertical direction and substantially concentricwith a vertical axis of rotation of said rotary means 30. The domeshapedstructure of the rotary means 30 is coupled to the hub 32 by radiallydisposed water delivery passages provided by tubular structures 50 and52. integral with the hub 32 of the rotary means 30. These tubularstructures 50 and 52 are coupled to the dome-shaped structure of therotary means 30 at its peripheral wall 54. The tubular structure 50comprises a passage area 56 extending to a hollow fitting 58 at theperimeter 54, all as shown best in FIG. 3 of the drawings. Coupled tothe fitting 58 is a hollow tubular extension 60 to which an inner end 62of the jet reaction pool cleaning tube 18 is secured. This jet reactionpool cleaning tube 18 is preferably of flexible plastic and is providedwith an open end 64 through which a jet of water may be issued to createnot only jet reaction and sinuous movement of the-tube 18 but also tocreatea high speed flow of water which will clean the bottom of the pooland scour the foreign matter therefrom into suspension in the pool sothat it may be carried away in the water passing to the filtering systemutilized to clean water in the pool.

As shown in FIG. 2 of the drawings, it will therefore be obvious thatthe pool cleaning tube 18 extends generally in a radial direction from avertical axis about which the rotary means 30 rotates as it is supportedon the stationary weight means 10.

The housing of the weight means 10 as well as that of the rotary means30 and of the tubular members 50 and 52 together with the hub 32 are allpreferably made of plastic or other material suitable to a swimming poolenvironment.

Communicating with the tubular structure 52 is a jet nozzle 66. This jetnozzle 66, as shown in FIG. 2 of the drawings, is provided with an openend 68 directed in such a manner as to cause a jet of water to issue inthe direction of an arrow 70 which direction is substantially tangentialrelative to the vertical axis about which the rotary means 30 rotates ashereinbefore described. Accordingly, this jet nozzle 66 tends to cause ajet reaction force tending to rotate the rotary means 30 in a directionof an arrow 72 as shown in FIG. 2 of the drawings.

A butterfly valve 74 is disposed in the hollow tubular structure 50 andin the passage 56 therein, and this butterfly valve is rotatably mountedon a substantially vertical axis shaft 76 which extends upwardly throughan opening 78 in the dome-shaped housing structure of the rotary means30. The shaft 76 at its upper end is provided with a manually engageableadjustment knob 80 and a friction and tension spring 82 tends to holdthis knob 80 in certain ad jlsted position so that when the butterflyvalve 74 is adjusted by the shaft 76 to a relatively open or relativelyclosed position, a pressure differential is created or varied betweenthe water passing through the pool cleaning tube 18 and that passingthrough the jet nozzle 68, thus as pressure in the jet nozzle 68 isvaried its jet propulsion force is varied and thus the rate of rotationof the rotary means 30 about a vertical axis and in a direction of anarrow 72, is varied, and therefore the movement of the pool cleaningtube 18 about said vertical axis is varied, and thus the pool cleaningtube at its connection with the fitting 60 is moved in variousdirections through 360 around the vertical axis of the rotary means 30.It will be noted that the weight means is the only means of theinvention which maintains the apparatus of the invention stationarilylocated in the bottom of the pool 15, and that the weight means 10 maybe moved longitudinally or laterally or at any direction desired nearerthe sides or the ends of the pool, depending upon the desire of theoperator, and it will be further noted that the flexible water deliveryconduit 12 extends generally in a vertical direction above a centralarea of the weight means so that the weight means is suspendinglyhandled by the water delivery conduit and that the water deliveryconduit is disposed upwardly in a direction above the areas in which thepool cleaning tube 18 may operate so as to prevent entanglement thereofwith the water delivery conduit 12.

In operation of the present invention, it will therefore be apparentthat the rate of rotation of the rotary means may be varied and that asingle pool cleaning tube 18 may be carried by the rotary means 30, andthat such a single tube may receive full volume of flow from the waterdelivery conduit 12 with the exception of the small amount utilized bythe jet nozzle 68 for rotating the rotary means 30 about a generallyvertical axis.

It will be obvious that full flow of the water delivery conduit 12 isdevoted to flow through a single pool cleaning tube 18. However, ifdesired, some of these tubes 18 may be secured to the rotary means 30 ina similar manner to that as disclosed in FIGS. 2 and 3 of the drawings.

The use of a rotary means and a single jet reactive pool cleaning tubesuch as the tube 18 has many advantages in that the angular dispositionof the pool cleaning tube is constantly changed with respect to avertical axis as the rotary means 30 rotates about said vertical axisand further the magnitude and jet capacity of the tube 18 may be quitesubstantial as compared to the maximum delivery which may be made by anyone of a plurality of pool cleaning tubes such as those dis closed inthe aforementioned copending patent application.

lt will be obvious to those skilled in the art that variousmodifications may be resorted to without departing from the spirit ofthe invention.

We claim:

, l. A swimming pool cleaning apparatus comprising: a manually portableand readily movable weight means adapted to sink in water; said weightmeans having horizontally disposed structure, the maximum dimensions ofwhich equal a small fraction of the length or breadth of a swimmingpool; said weight means being adapted to be manually moved andtemporarily located in various desired positions relative to the sidesand ends of a swimming pool and on the bottom of said swimming pool;said weight means having supporting surface means adapted frictionallyto engage the bottom of a swimming pool; said supporting surface meansbeing the only means coupled to said weight means for holding saidweight means stationarily on the bottom of a swimming pool; an elongatedflexible jet reactive pool cleaning tube coupled to said weight means ata position so as to dispose almost the entire length of said tube nearto the bottom of said pool; said pool cleaning tube having a majorportion of said length thereof disposed for engagement with the bottomor sides of a pool when said weight means is supported on the bottom ofsaid pool by said supporting surface means; a flexible water deliveryconduit coupled to said weight means and adapted to contain water underpressure in communication with said jet reactive pool cleaning tube;said jet reactive pool cleaning tube communicating with said waterdelivery conduit and adapted to receive water under pressure therefrom;said jet reaction tube having a free and open jet end meanssubstantially spaced from said weight means and adapted to issue a jetof water therefrom and to thereby cause sinuous movement of said poolcleaning tube relative to said weight means and relative to the bottomand sides of said swimming pool; said weight means being of sufficientmagnitude to hold said supporting surface means down in frictionallyengaged stationary relationship with the bottom of said pool so thatsaid weight means resists jet reaction forces imposed by said jetreactive pool cleaning tube whereby said weight means remains stationaryon the bottom of said pool while sinuous movement of said jet reactivepool cleaning tube continues to operate in a manually preselected areaaround said weight means for cleaning the bottom and sides of said pool;a rotary means rotatably mounted on said weight means about a generallyvertical axis of rotation; said rotary means having a passagecommunicating with said water delivery conduit; said pool cleaning tubecoupled to said rotary means and disposed in communication with saidpassage in said rotary means; whereby said rotary means may rotate aboutsaid vertical axis to allow disposition of said pool cleaning tube invarious directions around said vertical axis of said rotary means.

2. The invention as defined in claim 1, wherein: said rotary means beingdisposed above said weight means.

3. The invention as defined in claim 1, wherein: jet propulsion means iscoupled to said rotary means; said jet propulsion means having a jetnozzle communicating withsaid passage in said rotary means and adaptedto deliver water under pressure from said passage; said jet nozzledisposed at an angle toa radial direction with respect to saidverticalaxis so as to cause a jet propulsion force tending to rotatesaid rotary means about said vertical axis.

4. The invention as defined in claim 1, wherein: said water deliveryconduit extends in an upward direction from and above a generallycentral area of said weight means to prevent said pool cleaning tubefrom tangling with said water delivery conduit'at any area close to thebottom or sides of said swimming pool.

5. The invention as defined in claim 4, wherein: said water deliveryconduit is adapted suspendingly to hold said weight means in a generallyupright position for facilitating manual movement of said weight meansand for thus locating it on any one of various desired bottom areas of aswimming pool.

6. The invention as defined in claim 1, wherein: said rotary means isdisposed above said weight means; jet propulsion means coupled to saidrotary means; said jet propulsion means having a jet nozzlecommunicating with said passage in said rotary means and disposed toreceive water under pressure from said passage; said jet nozzle disposedat an angle to a radial direction with respect to said vertical axis soas to cause jet propulsion force tending to rotate said rotary meansabout said vertical axis; said water delivery conduit extending in anupward direction from and above a generally central area of said weightmeans to prevent said pool cleaning tube from tangling with said waterdelivery conduit at any area close to the bottom or sides of saidswimming pool; said water delivery conduit adapted suspendingly to holdsaid weight means in a generally upright position for facilitatingmanual movement of said'weight means and for thus locating it on any oneof various desired bottom areas of a swimming pool.

7. The invention as defined in claim 3, wherein: valve means is coupledto said rotary means for adjusting flow from said water delivery conduitinto said pool cleaning tube for varying pressure of water in saidpassage and relative to said jet propulsion means in order to vary therate of rotation of said rotary means about said generally verticalaxis.

8. The invention as defined in claim 1, wherein: said water deliveryconduit extends in an upward direction from and above a generallycentral area of said weight means to prevent said pool cleaning tubefrom tangling with said water delivery conduit at any area close to thebottom or sides of a swimming pool; said water delivery conduit adaptedsuspendingly to hold said weight means in a generally upright positionfor facilitating manual movement of said weight means and for thuslocating it on any one of various desired bottom areas of a swimmingpool.

1. A swimming pool cleaning apparatus comprising: a manually portableand readily movable weight means adapted to sink in water; said weightmeans having horizontally disposed structure, the maximum dimensions ofwhich equal a small fraction of the length or breadth of a swimmingpool; said weight means being adapted to be manually moved andtemporarily located in various desired positions relative to the sidesand ends of a swimming pool and on the bottom of said swimming pool;said weight means having supporting surface means adapted frictionallyto engage the bottom of a swimming pool; said supporting surface meansbeing the only means coupled to said weight means for holding saidweight means stationarily on the bottom of a swimming pool; an elongatedflexible jet reactive pool cleaning tube coupled to said weight means ata position so as to dispose almost the entire length of said tube nearto the bottom of said pool; said pool cleaning tube having a majorportion of said length thereof disposed for engagement with the bottomor sides of a pool when said weight means is supported on the bottom ofsaid pool by said supporting surface means; a flexible water deliveryconduit coupled to said weight means and adapted to contain water underpressure in communication with said jet reactive pool cleaning tube;said jet reactive pool cleaning tube communicating with said waterdelivery conduit and adapted to receive water under pressure therefrom;said jet reaction tube having a free and open jet end meanssubstantially spaced from said weight means and adapted to issue a jetof water therefrom and to thereby cause sinuous movement of said poolcleaning tube relative to said weight means and relative to the bottomand sides of said swimming pool; said weight means being of sufficientmagnitude to hold said supporting surface means down in frictionallyengaged stationary relationship with the bottom of said pool so thatsaid weight means Resists jet reaction forces imposed by said jetreactive pool cleaning tube whereby said weight means remains stationaryon the bottom of said pool while sinuous movement of said jet reactivepool cleaning tube continues to operate in a manually preselected areaaround said weight means for cleaning the bottom and sides of said pool;a rotary means rotatably mounted on said weight means about a generallyvertical axis of rotation; said rotary means having a passagecommunicating with said water delivery conduit; said pool cleaning tubecoupled to said rotary means and disposed in communication with saidpassage in said rotary means; whereby said rotary means may rotate aboutsaid vertical axis to allow disposition of said pool cleaning tube invarious directions around said vertical axis of said rotary means. 2.The invention as defined in claim 1, wherein: said rotary means beingdisposed above said weight means.
 3. The invention as defined in claim1, wherein: jet propulsion means is coupled to said rotary means; saidjet propulsion means having a jet nozzle communicating with said passagein said rotary means and adapted to deliver water under pressure fromsaid passage; said jet nozzle disposed at an angle to a radial directionwith respect to said vertical axis so as to cause a jet propulsion forcetending to rotate said rotary means about said vertical axis.
 4. Theinvention as defined in claim 1, wherein: said water delivery conduitextends in an upward direction from and above a generally central areaof said weight means to prevent said pool cleaning tube from tanglingwith said water delivery conduit at any area close to the bottom orsides of said swimming pool.
 5. The invention as defined in claim 4,wherein: said water delivery conduit is adapted suspendingly to holdsaid weight means in a generally upright position for facilitatingmanual movement of said weight means and for thus locating it on any oneof various desired bottom areas of a swimming pool.
 6. The invention asdefined in claim 1, wherein: said rotary means is disposed above saidweight means; jet propulsion means coupled to said rotary means; saidjet propulsion means having a jet nozzle communicating with said passagein said rotary means and disposed to receive water under pressure fromsaid passage; said jet nozzle disposed at an angle to a radial directionwith respect to said vertical axis so as to cause jet propulsion forcetending to rotate said rotary means about said vertical axis; said waterdelivery conduit extending in an upward direction from and above agenerally central area of said weight means to prevent said poolcleaning tube from tangling with said water delivery conduit at any areaclose to the bottom or sides of said swimming pool; said water deliveryconduit adapted suspendingly to hold said weight means in a generallyupright position for facilitating manual movement of said weight meansand for thus locating it on any one of various desired bottom areas of aswimming pool.
 7. The invention as defined in claim 3, wherein: valvemeans is coupled to said rotary means for adjusting flow from said waterdelivery conduit into said pool cleaning tube for varying pressure ofwater in said passage and relative to said jet propulsion means in orderto vary the rate of rotation of said rotary means about said generallyvertical axis.
 8. The invention as defined in claim 1, wherein: saidwater delivery conduit extends in an upward direction from and above agenerally central area of said weight means to prevent said poolcleaning tube from tangling with said water delivery conduit at any areaclose to the bottom or sides of a swimming pool; said water deliveryconduit adapted suspendingly to hold said weight means in a generallyupright position for facilitating manual movement of said weight meansand for thus locating it on any one of various desired bottom areas of aswimming pool.